Wheel.



No. 837,152. PATBNTED NOV. 27, 1906. J. THOMSON.

WHEEL.

APPLIUATION FILED ooT.11.19o5.

. .UNITED STATES PATENT OEEIOE.

JOHN THOMSON,FOF NEW YORK, Y., 'ASSIGNOR TO TRIDENTlTIR'E' COMPANY, O F NEW YORK, N. Y.,

A CORPORATION OFNEW YORK...

WHEEL.

Specification oit' Application led October T1 To a/ZZ whom t may concern."

Be it known that I, JOHN THOMSON, a citizen of the United States, residing in the borough of Manhattan, inthe city of New York, in the State of New York, have invented certain new and useful Improvements Wheels, of which the following is a speciiication, reference being had to the accom anying drawings, forming a part hereof.

T "s invention relates particularly to cushion-tired wheels, and has for its objectto provide a'tire which shall possess the adVan-.

. against destructive distortlon b kroad-surface.

The invention will be more fully described hereinafter with reference to the accompa- .f

, nying drawings, in which it isf illustrated asembodied in different forms, and in whichy Figure 1 is a view in side. elevation of a portion ofv a wheel to which the invention is applied, the wheel rim and tire being also shown in section. Fi 2 is an edge v/iewof a ortion of the wheel s Own in Fig. '1, partlyin radial' section. Fig. 3 isa detail view in radial section,.as in Fig; 2, but showing the relations ofthe parts when the wheel meets an obstruction; Fig. 4 is' a detail view in radial section, showing a modified embodiment of the invention.

The body of the'wheel, representedbythe' hub a, the s okes c', and the felly a2, may be of any rusua or preferred construction. In the embodimentof the invention represented in the drawings there is secured to! the felly a2 a metal ring t, which with its detachable member b forms a seat for the pneumatic tube c; As shown, the ring member bis seated upon a'portion of the main ring b and may bel secured in place by bolts or 'other suitable fastening devices b2. The two Lettersl Patent. Patented Nov.` 27, 1906.

.1965. serial No. 282,255.

tail recess b3. Both the main ring. b yand the detachable ring b are provided with .cheek-pieces b4, which are extended 'outwardly and preferably curved, as shown, to laccommodate thepneumatc tube c, the` edgesor lips b5 being turned in'toward each other to leave between them an o enin of less widthfthan the main body of tlie inosingrand supporting rim thus formed.

ed to'be iirmly en a ed within thev dovetail recess b3 ofthe rim provided on its outer face with a molded rib "c2 for engagement with acorrespo'nding recess d,\formed in the 'miner face of the solid cushion -tread ortion The pneumatic tube and the solid cushion-tread portion are preferably secured .iirmly to eachother by cement or otherwise', and suchunion 'of the two parts is facilitated by the rib' c2 and the recess d. The treadportion dis-likewise so.

he pneumatic tubel c, of any suitable con? struction, is preferably' provided'on its inner face with a molded rib or projection c', adapt- It is also preferably r formed, as by being provided with 1projecting @langes d2, as toengage the inward y-projecting edgesof the supporting-rim b b and to -be 4thereby preventedfrom projection'bef youd. the rim; otherwise-:the tread ortion `l'nreferably a truncated^ wedge "shape 1n crossf section-,'.I so ,that the opening between the .edgesof the ring b b s all. be substantially iilled when the tire'is in' normal condition, as

*shown in Fig. 2, and shallhave immediate Y between the edges of the when the tread meets an obstruction on the roadf` clearance surface and is thrusttoward Ithe axisfofthe wheel.

may have an'y suitable Vshape,valthoug it has In assembling the parts of the .structure shown in Figs` 1 and 2 the ring b vis first secured to the felly or body of the Wheel, as by screws t. The pneumatic tube c is then slipped uponl the ring b and is securely held in place thereon by the application of the ring b', creeping of the tube upon the ywheelbody being dprevented -by'this engagement.,

i If the tread has not been secured previously to the pneumatic tube by cement or otherwise, it is applied and secured, the pneumatic tube being deflated at thetime., as its external diameter with reference to the axis vof' the wheel vis somewhat .greater than the internal arts lof, the seat-ring bxb are preferably so ormed as to provide between them a dovediameter of the tread d.

It will be understood that the tread is se- IOO cured to the tube before the application of the-ring b', so that when such rlngis appliedv j The tube c may `have a different cross-s ec-4 tion-as shown, for example, in Fig. 4-the ringsb and b being suitably vshaped to accommodate the tube. The' tread da'may also `have a diierent shape-as shown, for example, in Fig. 4-in which it has simply a truncated wedge shape in cross-section Without projecting ribsy or anges, as in the form shown in Figs. 1, 2, and 3. The shape of the rings b and b; is yalso modified to suit the shape of the tread ortion, the lobject being to 'permit the trea lportion to yield freely inwardly and toprevent it from being projected beyond the supporting-rim.

It will be '-lunderstood that as the pneumatic tube is of somewhat'greater diameter externally with reference to the aXis of the wheel than the tread portion thevtube will be slightly compressed by the tread portion when it is applied andthat the increase of the air-pressure Within the tube will eX and the same outwardly and force the. trea portion outwardly untllv the flanges or sides thereof l impinge upon thewalls of`theouter casing-or ls's supporting-rim. The tread ortion will then be under,l initial tension and) the pneumatic tube will be supported'by the metal ring'at its inner diameter and bythe tread portion at its outer diameter.'4 The-casingl or support is preters'ibly' so shaped with reference to the v neumatic tube. as to'afford some clearance etween the tube and the walls of the;rim, as shown in Fig. 2,so that when the wheel rus undernormalconditions there will be practically no 'elding 'of the tire other than what would ta e place in an ordinary solid-rubber tire; but when an obstruction is encountered both -portions of the tire will give,the tread 'portion bending and the tube suffering compressionanddistortion,l as shown in Fig. 3, and compressing the air within the tube, asl in an ordinary pneumatic tire. If the'inward pressure on the tire is excessive, the inner `walls of the tube will be forced together,- as

shown in Fig. 3, and the composite tire will will also be the case when the tube is deiiated. Furthermore, through the attachment of the complete -a solid cushion-tarea This 'i l tube tothe wheel-body and the 'attachment of the treadportion to the tube there can be no creepipg of either portion. 'As the tube is y rotected against puncture, it can b e made of ighter 4material than an ordinary pneumatic tire and thefweight of rubber can e put into the tread portion, whereby pressures are distributed v.over a greater extent of the tube than in ordinary pneumatic tires,

requiring le'ss air-pressure `and less strength of material. y

I claim as myjinvention-L I 1. A wheel having'an outer casing or rim one side of which is detachable, said casing having a peripheral opening, a pneumatic tube located within -said casing and having `an inner and an outer rib, anda solidl tread supported on lsaid tube and projecting through the opening in the rim, and having a recess, said inner rib being clam ed by the detachable rim to the casing, an ysaid outer rib engaging the recess -in thesolid tread, substantially as shown and described- 2.' A wheel having anouter casing'or' rim one side offwln'ch is detachable, said casing having a er'ipheral opening, a pneumatic tube of ob ate cross-section located therein and having a rib vmolded thereon by which it is'secured to thev casing, and a solid cushiontread supported/on and secured to the tube, the'` arrangement and `construction being Asuch that theinner walls of said tube may be forcedinto contact limiting'the pneumatic action when the com osite parts will act as d), substantially as described. u A

3. A wheel having an outer casing o1' rim 'formed' in detachable sections, said casing vhaving a peri heral opening, a solid cushiontread partialy disposed 'Within the'casing I' and projecting through the opening, and a..

pneumatic tube of oblate section and 4comparatively limited radial action to support the tread, said Atube being clamped between the sections and secured .to the solid cushionl tread, substantially as described.

This specification slgned and witnessed this 22d day of September, A. D. `1905.

l JOHNv TH'oMsoN. I

In presence ofi v HIRAM C. CROSS, W. C. BURKE. 

